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(No ModeL) 8 4 Sheets-Sheet 1..

J. HOLLELY.

MACHINE FOR BEVELING THE BDGES OF GLASS PLATES. No. 387,233. PatentedAug. 7, 1888.

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J. HOLLELY.

MACHINE FOR BEVELING THE EDGES OF GLASS PLATES. No. 387,233. X PatentedAug. 7, 1888.

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N. PETERS. Phow-Lithognphur, Walhinglon. n. c.

(N0 Model.) 4 Sheets-Shet a.

J. HULL-ELY.

MAGHINE FOR BEVELING THE BDGES 0F GLASS PLATES. No. 387,233. PatentedAug.- 7, 1888.

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4 Sheets-Sheet 4.

(No Model.)

J. HOLLELY. MACHINE FOR BEVELING THE BDGES 0 GLASS PLATES.

Patented'Aug. 7, 1888.

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Human STATE PATENT Orrrcs.

JOSEPH HO LLELY, OF BROOKLYN, NEXV YORK.

IVIACHlNE FOR BEVELING THE EDGES OF GLASS PLATES.

SPECIFICATION forming part of Letters PatentNo. 387,233, dated August'7, 1888.

Application filed May 19, 1886. Serial No. 202.669. (No model.)

To aZZ whom it may concerm' Be itknown that LJosErH HOLLELY, acitizen ofthe United States, residing at Brooklyn, in the county of Kings andState of New York, have invented an Improved hfaehine'for Bevcling theEdges of Glass Platesyand I do hereby declare that the following is afull and exact description thereof, reference being had to theaccompanying drawings, making part of this specification.

My invention consists in various improvements in machines for grindingand polishing the bevel-edges of glass plates for mirrors and otheruses, substantially as herein specified, and pointed out in the claims.

In the accompanying drawings, Figure 1 represents a side view of themachine. the revolving grinding-disk and sand-receiving basinsurrounding the same being in central vertical section and some otherparts being removed; Fig. 2, a top View of the machine; Fig. 3, an endview of one wing of the machine, as looking from the right toward theleft in Fig. 1; Fig. 4, a vertical section of the part shown in Fig. 3,taken in a plane indicated by the line 1 1, Figs. 1 and 2; Fig. 5, a topview, on an enlarged scale, of the clutch for holding glass plates withstraight edges; Fig. 6, a vertical section of the same in a planeindicated by the line 2 2, Fig. 5, showing also a section of theadjacent edge of the grinding-disk; Fig. 7, a side view and partialcentral vertical section, on an enlarged scale, of the clutch forholding circular plates of glass and the means employed for rotating thesame during the grinding of the plates held thereby, showing also avertical section of the adjacent edge of the grinding-disk; Fig. 8, acentral axial section of the clutch, some of the parts being only inelevation; Fig. 9, a horizontal section of the same in aplane indicatedby theline 3 3,Fig. 8.

Like letters designate corresponding parts in all of the figures.

The operative parts of the machine are mounted in anysuitably-constructed frame, as shown in the drawings, or otherwise.

Centrally located in the frame, and running in step and cross bearingscab, is the main shaft A, which carries and rotates the horizontalgrinding-disk B, suitably made of castiron turned smooth and plane onits upper grinding-surface, but having ashallow recess, 0, near thecenter around its shaft, for first receiving the sand and water used ingrinding and to form a terminal inner, as well as outer, edge for thedisk, over which the articles to be ground are reciprocated radially,thereby insuring a uniform wear of the surface. This grinding-disk isrotated at a speed of about two hundred and seventy revolutions per minute (more or less) by a belt, (I, passing from the powershaft around apulley, e, on the main shaft A.

The sand, of proper fineness, mixed with water to about the consistencyof cream, is first placed in a suitable hopper, O, (partly shown in Fig.1,) suspended nearly in a central position over the grindingdisk, and isallowed to flow therefrom in requisite quantity and to fall into thecentral cavity or recess, e, of the grinding-disk, and from there it isdriven radially outward in all directions over the surface of the diskby centrifugal ac tion produced by the revolving motion of the saiddisk. Around and under the grindingdisk is situated a stationaryreceiving'basin, D, for the discharged sand and water, substantially asshown in Figs. 1 and 2. The upper edge or rim, f, of this basin issomewhat higher than the upper surface of the grinding-disk, as shown inFig. 1, sufficiently so to catch the sand and water thrown from the diskto pro tect the machine, and especially the operative parts thereof,from the dcstructive effects of the swiftly-propelled sand. Under themiddle of the grinding-disk, around its shaft, is an innerupwardly-projecting wall or periphery, g, to prevent the escape of thesand and water inwardly, to theinjury of the said shaft and itsbearings. This sand-receiving basin, constructed and arranged as aboveset forth. constitutes an improvement of value in such a machine. Thesand caught in the basin is drawn off through one or more holes in thebottomof the basin, as indicated by dotted lines in Fig. 2. Now, withsuch a grindingdisk of proper diameter four or more plates of glass maybe ground at the same time, and I have represented in Fig. 2 fourclutches for holding four plates of glass, and these clutches areconstructed and organized in their movements so that plates of glass maybe readily inserted therein and taken therefrom while the grinding-diskcontinues its uninterrupted revolutions, and the plates inserted in andtaken from each separate clutch while all the others continue in action.Thus the attendant can remove the ground'glass plate from each clutch insuccession and replace it by a plate not ground, so that no loss of timeis suffered in the operations of the machine, and the attendant is keptconstantly employed in supplying it with nugronnd plates and removingfrom it the finished plates. The four plateholding clutchcs'shown inFig. 2 are arranged in equidistant positions around the circu mferenceof the grinding-disk, and their reciprocating movements over thegrinding-disk are in radial directions, so that the motions of each arerespectively at right angles to those of adjacent clutches; and, whileother organizations might be employed, I find it'to be very advantageousto have two clutches, E E, for planeedged plates and two clutches, F F,for circular plates, a clutch E revolving opposite to and alternating inaction with a clutch F; and, also, as another improvement, each clutch Eis reciprocated directly by a clutch F or its slide, the latterreceiving its reciprocating motion from the main shaft A. Thesemovements and the means of imparting them are now to be described.

The means of driving one pair of clutches E F is shown in Figs. 1, 3,and 4. From a pulley on the main shaft A a belt, h, passes to a pulley,i, on a transmitting-shaft, G, which drives a third shaft, H, bygear-wheelsj 7- on the respective shafts. The shaft H has abevelgear-wheel, Z, on its upper end, gearing into a larger bevelwheel, l, ona horizontal shaft, J. The bevel-wheel I serves as a crank-wheel, acrank-pin, m, being on its face, for operating a connecting rod orpitman, a,pivoted thereon, the other end of the pitman being pivoted toa bracket, 0, bolted or otherwise seen red to a slide, K, which carriesthe clutch F, for holding and rotating circular glass plates. Thediameter of the circle in which the crank-pin in revolves determines theextent of the reciprocation of the clutch over the grinding disk B; andin order to vary the extent of this reciprocating movement as may berequired the crank-pin is or may be adjusted to different distances fromthe center of the gear-wheel I by being inserted in different holestherein, as indicated in Fig. 1.

By the means thus far described one of the clutches is given therequisite reciprocating movement. Forcommunieatingacorrespondingreciprocating movement to the opposite clutch E a very simple means iseffective. This consists in an arm, secured at one end to the bracket ofthe clutchslide K, a similar arm, q, secured at one end to acorresponding bracket, 0', on the slide L of the opposite clutch, and aconnecting-rod, 5, attached at its two ends to the other free ends ofthe two arms, so that the two clutch-slides are caused to recip roeatetogether as one. The connecting-rod is adjustably secured to the twoarms by socketsleeves t t on the two arms and holding-screws u u, asshown, or by equivalent means, whereby the position of the clutch E maybe adjusted to correspond with that of the clutch F and its traverseover the grindingdisk may be changed at will. There is a specialadvantage gained by this simple means of reciprocating one clutch by thereciprocating slide of the other clutch, in that one clutch is madealways to travel outward over the grindingdisk while the other istraveling inward, alternating in their inward and outward movements, sothat the action of the grinding-disk on the plates carried by theclutches is made uniform throughout their reciprocating movements. Aprecisely similar means of reciprocating the other two clutches at rightangles to the two above referred to is employed, as indicated in Fig. 2,the belt 1; therefor running from the pulley on the main drivingshaftbeing shown just above the first described. The connecting-rod sispreferably made to run in a guidebearing, 10, and the same guide-bearingmay serve for the other connecting-rod running in a direction at rightangles to the first named, as shown in Fig. 1.

For rotating the clutch F for holding circular plates of glass so as tobring all parts of the edge equally in contact with the grindingdisk,the following means is shown: A belt, 0:, passes from a pulley on thevertical shaft H first around the idler-pulleys y 3 to change thedirection of the belt from horizontal to vertical, 'and thence upwardand around a pulley, 2, on a horizontal shaft, ll/Lwhich turns thespindle N of the clutch, being geared thereto at its inner end by twobevel gearwheels, at b, as shown in Fig. 7. Since the inner end of thisshaft must reciprocate endwise with the clutch, and the outer end of theshaft carries a pulley stationary in position, the shaft is made in twoparts, the outer part, 0, being hollow or tubular and running in twosupporting-bearings, e e, and the inner part, cl, being angular andsliding in an angular socket in the inner end of the tubular shaft, butturned therewith. The inner end of the inner part of the shaft has abearing, f, in the frame of the clutch F; and in order that the clutchmay be readily uugeared from the shaft the inner end of the said shaft,forming thejournal which turns in the said hearing, has a flange on theend or groove therein, behind or in which a latch, g, fits to hold theshaft-journal in the bearing, so that on lifting the latch the shaft mayat once be withdrawn therefrom far enough to ungear it from the spindleor mandrel of the clutch, the inner part of the shaft M sliding freelyin the outer tubular part thereof. For manipulating this inner part ofthe shaft for gearing it with or ungearing it from the spindle ormandrel, there is a handle, h, on the shaft, which is rounded in thatpart, so that the shaft may continue to revolve freely in the handlewhile it is held by the hand of the operator. The

holding-latch g is pivoted at one end and held down on the shaft by aspring, i, as shown in Figs. 8 and 9.

The clutch itself is constructed with a rectangular frame, 0, sliding inways j j of the slide K at the required proper inclination to give thebevel to the plates, as shown in Figs. 7, 8, and 9. The clutch proper iscomposed of two clamp-plates, k and Z, between which the plates of glassare centered and held. The lower plate, 7;, which is smaller in diameterthan the glass plates held in the clutch, so as not to come in contactwith the grinding-disk, has astep-bearing, m, in the lower bar of theframe, and is held therein by a screw, a, projecting into a groove, 0,of the journal of the disk, as shown in Figs. 7 and 8. The upper plate,Z, of the clutch is larger than the plates of glass to be held thereby,and has a flange, p, around its lower side or face to surround the glassplates and retain them in a central position. The faces of bothehuck-plateshavesheets or linings q'r of india-rubber or equivalentpacking material, to press in immediate contact with the glass platesfor holding the same tightly and preventing injury thereto.

In a hub or boss, 8, on the upper side of the upper clutch-plate is asquare or angular socket, t, in which fits the lower end of the spindleor mandrel N by which the clutch is rotated. The upper end of the clutchspindle or mandrel has an extended bearing, a, in the upper bar of theframe, over the upper end of which a cap, o, screws, like a stuffingbox. In the center of this cap a set screw, w, screws and bears on theupper end of the clutch spindle or mandrel for tightening the upperclutch-plate down upon the plate of glass to be beveled. When a plate ofglass is to be removed from the cl uteh, the screw 10' is to beunscrewed two or three turns. Then to remove a plate the clutch-frame isdrawn up from its slideways, the driving-shaft having first beenungeared from its spindle or mandrel, as above set forth. Theclutch-frame, after removal from its ways, is then reversed in position,or placed upside down, in which position the mandrel will drop in theframe as far as the partially-withdrawn screw will permit, and the upperclutch-plate, Z, then underneath, will drop with the mandrel, leavingthe glass plate free to be withdrawn and another plate put in its place.Then the clutchframe is again put into its ways, the screw w is againtightened down upon the spindle or mandrel, and the drivingshaft isgeared to the spindle or mandrel. Duringthis unclutching and clutchingmanipulation the machine is kept in constant motion. The pressure of theglass plate upon the grinding-disk is produced by the weight of theclutch and frame. It may be regulated, if desired, by any suitable orknown means. Any equivalent of the adjnstingscrew w for clamping theglass between the elutch-platcs may be used instead of the same.

The clutch E for holding straight-edged glass plates not requiring to berotated, the construction is simpler than that for holding circularplates. Besides the views shown in Figs.1 and 2, I have shown theconstruction on a larger scalein Figs. 5 and 6. The clutch is pivoted atthe rear edge by journals rv m in bearings 31 y of the carrying-slideL,so that it can be adjusted to any desired angle of inclination formaking the desired bevel and for convenience in shifting the plates todifferent positions, in order that each edge may be successivelypresented to the action of the grinding-disk. Caps zz' cover thebearingsand journals of the clutch, and they are pivoted at one end onholding and set screws a a", so that the other end may be free to beswung offaud on the bearings to enablethejournals of the clutch to belifted therefrom and the whole chuck removed thereby for convenience incleaning away the sand which accumulates in different parts of theclutch and would damage it if allowed to remainau indefinite length oftime. I have shown in Figs. 1 and 6 the carrying-slide raisedconsiderably above the grindingdisk,with the forward part, on which theclutch is immediately supported, bent downward, so that the slidewaysmay be elevated above the throw of the sand from the grinding-disk,whereby friction and damage to the slide are avoided. it is preferable,also, to have the slide and ways of the circular-plate clutches elevatedin a similar way .for a similar purpose, although not so represented inthe drawings.

A set-screw, (or scrcws,)b' is placed in the front end of the slide forthe chuck to rest on and to adj nst its height in relation to thesurface of the grinding-disk. The carrying frame or bracket of the slidemay also be readily adjusted in height on the slide proper by screws 00. The clutch is composed of two plates, d f between which the glassplates are clamped, the inner sur.aces of the two plates havingindiarubber or equivalent elastic or soft linings g h to bearimmediately on the sides of the glass and prevent unequal pressure andavoid fractures of the plates. The clutchplates are pressed against theglass plates by means of hook-catches i 1'? on the under plate, reachingup through the upper plate, and a swinging bar, j", pivoted in themiddle to the upper plate, so that the two ends may be swung under thesaid catch hooks and press the clutch'plates together by wedge action.Any

equivalent means maybe used; but this means is simple and convenient.The rear edge of one clutch-plate is hinged at k to thejournalbar of theclutch, as shown, for separating the plates. On top of the clutch areplaced weights P 1?, one, two, or more,'for giving the requisitepressure to the chuck for grinding with the requisite speed, a series ofsuch weights being required for adjusting the pressure. The same meansmay be employed in relation to the circular-plate chuck, but not shownin thcdrawings.

I claim as my invention IIO 1. The combination ofarevolving grindingdisk and one or more glass-plate-holding clutches having a reciprocatingmovement radially over the said grinding-disk across the plane facethereof.

2. The combination of a revolving gri ndingdisk and one or moreglassplateholding clutches having a reciprocating movement radially overthe face of the grindingdisk in adjustable positions, for the purposeherein speci- 3. The combination of a revolving grindingdisk and two'glass-plate-holding clutches placed diametrically opposite to eachother across the disk, and having a radial reciprocating movement overthe disk, the movement of each clutch being OUtW211(l,Wl1il6 that of theother is inward, for the purpose herein set forth.

4. The combination of a revolving grindingdisk, acircular-glass-plate-holding clutch having a reciprocating motionradially over the disk, and a rotating mandrel for imparting a rotarymotion to the glass plates during the reciprocations of the clutch.

5. The combination of a revolving grinding disk, acircular-glass-platc-holding clutch having a reciprocating motionradially over the disk, and a straight-edged glass-plate-holding clutchhaving a reciprocating motion over the disk imparted to it directly bythe other cl ntch or its sliding carriage, substantially as and for thepurpose herein specified.

6. The reciprocating circular-glass plateholding clutch provided with arevolving spindle or mandrel, anda revolving-mandrel driving-shaftconstructed in two parts, one part sliding in and coupled to the other,substantially as and for the purpose herein specified.

7. Areciprocating circular-glass-plate clutch provided with a revolvingspindle or mandrel, in combination with a longitudinally-movabledriving-shaft geared to the mandrel, having its adjacent journal coupledin its bearing, and a holding and releasing catch, substantially as andfor the purpose herein specified.

8. A circular-glass-plate clutch having two clamping-plates, one platebeing smaller in diameter than the glass plate to be held, and the otherplate being as large as or larger than the glass plates in diameter, forthe purpose herein specified.

9. A cireular-glassplate clutch having two clamping-plates, one smallerand the other larger in diameter than the glass plates to be heldbetween them, and the larger plate having a projecting rim or flangeadapted to surround and hold in central position the said glass plates.

10. A circular-glass-plate clutch having two clamping-plates, onesmaller and the other larger than or as large as the glass plates indiameter, and the surfaces of the two plates having a thickness ofindia-rubber or other elastic soft material upon them, substantially asand for the purpose herein specified.

11. In a glass-plate beveling orgrinding machine, a reciprocatingstraight-edged-glassplate clutch pivoted to its slide carrier, thebearings of the carrier having swinging caps to cover theremovablejournals of the clutches, substantially as and, for the purposeherein specified.

12. The straight-edged-glass-plate clutch constructed with twoclamp-plates hinged to gether at one edge and tightened by wedgeactinghooks projecting from one plate, and a swinging bar on the other platecatching into the hooks, substantially as herein specified.

13. A straight edged glass plate clutch hinged atone edge to itsslide-carrier, and provided with a series of attachable and removableweights for graduating the pressure of the glass plate on thegrinding-disk, substan tially as herein specified.

let. The combination of the movable part (1 of the shaft M, and thehandle it, in which said shaft freely turns, substantially as and forthe purpose herein specified.

JOSEPH HOLLELY.

\Vitnesses:

AL. SOUIVEND, llIAN H. JULIAN.

